document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=963456>Question 963456</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Aquilla buys 50 stamps, some for 0.10cents and some for 0.20cents. If she spends $6.40 altogether, how many 0.10cents stamps does she buy? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #808146 by </B><A HREF=/tutors/aboutme.mpl?userid=CubeyThePenguin><B>CubeyThePenguin(3113)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=CubeyThePenguin><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=CubeyThePenguin><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=808146\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = number of 10 cent stamps<BR>\n" );
document.write( "y = number of 20 cent stamps\r<BR>\n" );
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document.write( "x + y = 50<BR>\n" );
document.write( "10x + 20y = 640\r<BR>\n" );
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document.write( "20x + 20y = 1000<BR>\n" );
document.write( "-10x - 20y = -640<BR>\n" );
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document.write( "10x = 360<BR>\n" );
document.write( "x = 36\r<BR>\n" );
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document.write( "She bought 36 10 cent stamps. </SPAN>\n" );
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